CN207801887U - The protection circuit of IGBT drivers - Google Patents
The protection circuit of IGBT drivers Download PDFInfo
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- CN207801887U CN207801887U CN201721809085.3U CN201721809085U CN207801887U CN 207801887 U CN207801887 U CN 207801887U CN 201721809085 U CN201721809085 U CN 201721809085U CN 207801887 U CN207801887 U CN 207801887U
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Abstract
The utility model discloses a kind of protection circuits of IGBT drivers; it includes driving voltage detection unit, reference voltage unit, comparator, protection location; driving voltage detection unit, reference voltage unit are all connected with comparator, and protection location is connected with driving voltage detection unit.The utility model solves the problems, such as in the prior art can only be single by scheme caused by the actuator voltage at detection IGBT forceful electric power end to the protection of high-power IGBT module short circuit; the case where being mixed so as to avoid driver strong, weak electricity; it eliminates to security risk existing for controller; further; in short-circuit protection failure or the non-shorting state of overcurrent; the reliability of short-circuit protection is improved, protection circuit is safer.
Description
Technical field
The utility model is related to a kind of protection circuits, more particularly to a kind of protection circuit of IGBT drivers.
Background technology
The IGBT when short-circuit protection of conventional IGBT drivers is by opening（Insulated gate bipolar transistor pipe）Collection
Electrode carries out voltage detecting, and short-circuit protection threshold value is not achieved in when normal work.When a short circuit occurs, due to flowing through the electricity of collector
Stream quickly variation, until reaching short-circuit protection threshold value.Implement self-lock protection by the signal processing circuit of IGBT drivers.This
Sample, which may exist, is also not up to short-circuit protection threshold value when certain abnormal conditions cause short circuit current very big, protection is failure to actuate, i.e.,
Short-circuit protection fails, extremely bad to the protecting effect of circuit in this way to damage IGBT starters, very dangerous.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of protection circuits of IGBT drivers, and which solve existing
Having can only be by side caused by the actuator voltage at detection IGBT forceful electric power end to the protection of high-power IGBT module short circuit in technology
The single problem of case eliminates the case where mixing so as to avoid driver strong, weak electricity to security risk existing for controller,
Further, in short-circuit protection failure or the non-shorting state of overcurrent, the reliability of short-circuit protection is improved, protection circuit is more pacified
Entirely.
The utility model is to solve above-mentioned technical problem by following technical proposals：A kind of protection of IGBT drivers
Circuit, which is characterized in that it includes driving voltage detection unit, reference voltage unit, comparator, protection location, driving voltage
Detection unit, reference voltage unit are all connected with comparator, and protection location is connected with driving voltage detection unit, wherein：
Driving voltage detection unit comprising voltage checking chip, the first triode, the second triode, first resistor,
Two resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth electricity
Resistance, the first capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the first diode,
Second diode, the first pin of voltage checking chip, second pin, third pin, the 4th pin, the 5th pin are respectively with
One resistance, second resistance, 3rd resistor, the 4th resistance, the 5th resistance are connected, first resistor, second resistance, 3rd resistor, the
Four resistance, the 5th resistance are connected with the first capacitance, the second capacitance, the first diode, the 6th resistance, the 7th resistance respectively, and second
Capacitance is connected with the collector of the first triode, and the first diode is connected with the emitter of the first triode, the first triode
Base stage is connected with third capacitance, the 6th resistance, the 7th resistor coupled in parallel and all connects with the 8th resistance, the first capacitance and third capacitance
In parallel and all connect with the 8th resistance, the 6th pin, the 7th pin, the 9th pin, the tenth pin of voltage checking chip are distinguished
It is connected with the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the 4th capacitance is in parallel with the 5th capacitance and all electric with the 9th
Resistance series connection, the 6th capacitance are connected with the emitter of the second triode, and the 7th capacitance is connected with the collector of the second triode, and second
The base stage of triode is connected with the tenth resistance, the 9th resistance and the tenth resistor coupled in parallel and all with the second Diode series and base；
Reference voltage unit comprising voltage source, transformer, eleventh resistor, twelfth resistor, thirteenth resistor,
Eight capacitances, the 9th capacitance, the tenth capacitance, third diode, the 4th diode, the 5th diode, a termination of eleventh resistor
The ground other end is connected with the cathode of voltage source, and the positive and negative anodes of voltage source are connected with the 8th capacitance, the 9th capacitance respectively, the 11st electricity
Resistance is connected with the 9th capacitance, and the first pin of transformer, second pin are connected with the 8th capacitance, the 9th capacitance respectively, transformer
Third pin, the 4th pin be connected respectively with twelfth resistor, the tenth capacitance, twelfth resistor and third Diode series,
All with the 5th Diode series, the tenth capacitance connects with thirteenth resistor for twelfth resistor, third diode, third diode with
Thirteenth resistor it is in parallel and all with the 4th Diode series；
Protection location comprising voltage protection chip, third transistor, the 14th resistance, the 15th resistance, the 16th electricity
Resistance, the 11st capacitance, the 12nd capacitance, the 13rd capacitance, the 14th capacitance, the first transistor, second transistor, the first open circuit
Device, the second breaker, third breaker, the 6th diode, the 7th diode, the 8th diode, the 9th diode, voltage protection
The first pin, second pin, the third pin of chip are connected with the 6th diode, the 7th diode, the 8th diode respectively, the
Six diodes, the 7th diode, the 8th diode are connected with the 11st capacitance, the 14th resistance, second transistor respectively, and the tenth
In parallel and all connect with the first transistor, the 15th resistance and first crystal between one capacitance, the 14th resistance, second transistor
Pipe is connected, the 4th pin of voltage protection chip, the 5th pin, the 6th pin respectively with the first breaker, the second breaker, the
Three breakers be connected, the first breaker, the second breaker, third breaker respectively with the 12nd capacitance, the 13rd capacitance, the tenth
Four capacitances are connected, and the 12nd capacitance is connected with the emitter of third transistor, the collector of the 13rd capacitance and third transistor
Be connected, the base stage of third transistor is connected with the 16th resistance, the 14th capacitance and the 9th Diode series, the 9th diode and
16th resistance is connected and is grounded.
Preferably, the first transistor, second transistor are all quartz systems.
Preferably, first breaker, the second breaker, third breaker are all vacuum circuit breakers.
Preferably, the voltage checking chip using S-1206B12-I6T2G models chip.
Preferably, the voltage protection chip using R3111N351C-TR-F models chip.
The positive effect of the utility model is：The utility model solves in the prior art to high-power IGBT mould
Block short-circuit protection can only be by detecting IGBT forceful electric power end actuator voltage caused by the single problem of scheme, so as to avoid
The case where driver strong, weak electricity mixes, eliminates to security risk existing for controller, further, fails in short-circuit protection
Or when the non-shorting state of overcurrent, the reliability of short-circuit protection is improved, protection circuit is safer.
Description of the drawings
Fig. 1 is the overall construction drawing of the utility model.
Fig. 2 is the circuit diagram of the driving voltage detection unit of the utility model.
Fig. 3 is the circuit diagram of the reference voltage unit of the utility model.
Fig. 4 is the circuit diagram of the protection location of the utility model.
Specific implementation mode
The utility model preferred embodiment is provided below in conjunction with the accompanying drawings, the technical solution of the utility model is described in detail.
As shown in Figures 1 to 4, the protection circuit of the utility model IGBT drivers includes driving voltage detection unit 1, ginseng
Voltage cell 2, comparator 3, protection location 4 are examined, driving voltage detection unit 1, reference voltage unit 2 are all connected with comparator 3,
Protection location 4 is connected with driving voltage detection unit 1, wherein：
Driving voltage detection unit 1 comprising voltage checking chip A1, the first triode Q1, the second triode Q2, first
Resistance R1, second resistance 2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th
Resistance R8, the 9th resistance R9, the tenth resistance R10, the first capacitance C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4,
Five capacitance C5, the 6th capacitance C6, the 7th capacitance C7, the first diode D1, the second diode D2, the first of voltage checking chip A1
Pin, second pin, third pin, the 4th pin, the 5th pin respectively with first resistor R1, second resistance 2,3rd resistor
R3, the 4th resistance R4, the 5th resistance R5 are connected, first resistor R1, second resistance 2,3rd resistor R3, the 4th resistance R4, the 5th
Resistance R5 connects with the first capacitance C1, the second capacitance C2, the first diode D1, the 6th resistance R6, the 7th resistance R7 respectively, and second
Capacitance C2 is connected with the collector of the first triode Q1, and the first diode D1 is connected with the emitter of the first triode Q1, and first
The base stage of triode Q1 is connected with third capacitance C3, and the 6th resistance R6, the 7th resistance R7 is in parallel and all connects with the 8th resistance R8,
First capacitance C1 is in parallel with third capacitance C3 and all connects with the 8th resistance R8, the 6th pin of voltage checking chip A1, the 7th
Pin, the 9th pin, the tenth pin are connected with the 4th capacitance C4, the 5th capacitance C5, the 6th capacitance C6, the 7th capacitance C7 respectively,
4th capacitance C4 is in parallel with the 5th capacitance C5 and all connects with the 9th resistance R9, the transmitting of the 6th capacitance C6 and the second triode Q2
Extremely it is connected, the 7th capacitance C7 is connected with the collector of the second triode Q2, the base stage of the second triode Q2 and the tenth resistance R10 phases
Even, the 9th resistance R9 is in parallel with the tenth resistance R10 and all connects with the second diode D2 and base；
Reference voltage unit 2 comprising voltage source E, transformer T1, eleventh resistor R11, twelfth resistor R12, the tenth
Three resistance R13, the 8th capacitance C8, the 9th capacitance C9, the tenth capacitance C10, third diode D3, the 4th diode D4, the five or two
One end ground connection other end of pole pipe D5, eleventh resistor R11 are connected with the cathode of voltage source E, the positive and negative anodes of voltage source E respectively with
8th capacitance C8, the 9th capacitance C9 are connected, and eleventh resistor R11 connects with the 9th capacitance C9, the first pin of transformer T1, the
Two pins are connected with the 8th capacitance C8, the 9th capacitance C9 respectively, and the third pin of transformer T1, the 4th pin are respectively with the 12nd
Resistance R12, the tenth capacitance C10 are connected, and twelfth resistor R12 connects with third diode D3, twelfth resistor R12, the three or two
Pole pipe D3 connects with the 5th diode D5, and the tenth capacitance C10 connects with thirteenth resistor R13, third diode D3 and the tenth
Three resistance R13 are in parallel and all connect with the 4th diode D4；
Protection location 4 comprising voltage protection chip A2, third transistor Q3, the 14th resistance R14, the 15th resistance
R15, the 16th resistance R16, the 11st capacitance C11, the 12nd capacitance C12, the 13rd capacitance C13, the 14th capacitance C14,
One transistor X1, second transistor X2, the first circuit breaker Q F1, the second circuit breaker Q F2, third circuit breaker Q F3, the 6th diode
D6, the 7th diode D7, the 8th diode D8, the 9th diode D9, the first pin of voltage protection chip A2, second pin,
Third pin is connected with the 6th diode D6, the 7th diode D7, the 8th diode D8 respectively, the 6th diode D6, the seven or two
Pole pipe D7, the 8th diode D8 connect with the 11st capacitance C11, the 14th resistance R14, second transistor X2 respectively, and the 11st
In parallel and all connect with the first transistor X1, the 15th resistance between capacitance C11, the 14th resistance R14, second transistor X2
R15 connects with the first transistor X1, and the 4th pin, the 5th pin, the 6th pin of voltage protection chip A2 is disconnected with first respectively
Road device QF1, the second circuit breaker Q F2, third circuit breaker Q F3 are connected, the first circuit breaker Q F1, the second circuit breaker Q F2, third open circuit
Device QF3 connects with the 12nd capacitance C12, the 13rd capacitance C13, the 14th capacitance C14 respectively, the 12nd capacitance C12 and third
The emitter of triode Q3 is connected, and the 13rd capacitance C13 is connected with the collector of third transistor Q3, the base of third transistor Q3
Pole is connected with the 16th resistance R16, and the 14th capacitance C14 connects with the 9th diode D9, the electricity of the 9th diode D9 and the 16th
Resistance R16 connects and is grounded.
The first transistor X1, second transistor X2 are quartz systems, and anti-interference ability is stronger.
First circuit breaker Q F1, the second circuit breaker Q F2, third circuit breaker Q F3 are vacuum circuit breaker, circuit breaker effect
More preferably.
Voltage checking chip A1 detects the voltage effect flowed through using a kind of chip of S-1206B12-I6T2G models
Fruit is more preferable.
For voltage protection chip A2 using a kind of chip of R3111N351C-TR-F models, protection circuit is safer.
The operation principle of the utility model is as follows：Driving voltage detection unit 1, reference voltage unit 2 all with 3 phase of comparator
Even, reference voltage unit 2 is connected with driving voltage detection unit 1, and protection location 4 is connected with comparator 3, passes through detection in this way
The actuator voltage of IGBT, solving in the prior art can only be by detecting IGBT forceful electric power to the protection of high-power IGBT module short circuit
The single problem of scheme caused by the actuator voltage at end eliminates the case where mixing so as to avoid driver strong, weak electricity
To security risk existing for controller, further, in short-circuit protection failure or the non-shorting state of overcurrent, short-circuit guarantor is improved
The reliability of shield.For driving voltage detection unit for detecting actuator voltage, reference voltage unit sends out reference voltage, comparator
Reference voltage is compared with detection voltage, protection location determines whether to start according to comparison result protects the short circuit of IGBT
Shield, it is more preferable to the protecting effect of circuit in this way.First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th
Resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor,
14 resistance, the 15th resistance, the 16th resistance have the function of choked flow, allow by electric current it is more tiny convenient for control.The
One capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the 8th capacitance, the 9th electricity
Appearance, the tenth capacitance, the 11st capacitance, the 12nd capacitance, the 13rd capacitance, the 14th capacitance can stored current while allow it is logical
The electric current crossed more is stablized.First diode, the second diode, third diode, the 4th diode, the 5th diode, the 6th
The alternating current that diode, the 7th diode, the 8th diode, the 9th diode have rectified action direction can be alternately changed becomes
Change the pulse direct current of single direction into.The first transistor, second transistor have extraordinary frequency stability and the anti-external world
The ability of interference, by reference frequency come the accuracy of the frequency in control circuit.First breaker, the second breaker, third
Breaker carries out open circuit to protect the safety of circuit when circuit voltage is excessive, to circuit.First triode, the two or three pole
Pipe, third transistor can amplify electric current, allow the Current Voltage flowed through convenient for detection.Transformer can change electric current electricity in circuit
The size of pressure improves the working efficiency of circuit.Voltage source provides reference voltage.The driving electricity that voltage checking chip detection is flowed through
Pressure.Voltage protection chip protects circuit when voltage is excessive.
Particular embodiments described above, the technical issues of to the solution of the utility model, technical solution and advantageous effect
It has been further described, it should be understood that the foregoing is merely specific embodiment of the utility model, not
For limiting the utility model, within the spirit and principle of the utility model, any modification for being made, changes equivalent replacement
Into etc., it should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of protection circuit of IGBT drivers, which is characterized in that it includes driving voltage detection unit, reference voltage list
Member, comparator, protection location, driving voltage detection unit, reference voltage unit are all connected with comparator, protection location and driving
Voltage detection unit is connected, wherein：
Driving voltage detection unit comprising voltage checking chip, the first triode, the second triode, first resistor, the second electricity
Resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance,
One capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the first diode, second
Diode, the first pin, second pin, third pin, the 4th pin, the 5th pin of voltage checking chip are electric with first respectively
Resistance, second resistance, 3rd resistor, the 4th resistance, the 5th resistance are connected, first resistor, second resistance, 3rd resistor, the 4th electricity
Resistance, the 5th resistance are connected with the first capacitance, the second capacitance, the first diode, the 6th resistance, the 7th resistance respectively, the second capacitance
It is connected with the collector of the first triode, the first diode is connected with the emitter of the first triode, the base stage of the first triode
It is connected with third capacitance, the 6th resistance, the 7th resistor coupled in parallel and all connects with the 8th resistance, the first capacitance is in parallel with third capacitance
And all connect with the 8th resistance, the 6th pin of voltage checking chip, the 7th pin, the 9th pin, the tenth pin are respectively with
Four capacitances, the 5th capacitance, the 6th capacitance, the 7th capacitance be connected, the 4th capacitance it is in parallel with the 5th capacitance and all with the 9th resistance string
Connection, the 6th capacitance are connected with the emitter of the second triode, and the 7th capacitance is connected with the collector of the second triode, the two or three pole
The base stage of pipe is connected with the tenth resistance, the 9th resistance and the tenth resistor coupled in parallel and all with the second Diode series and base；
Reference voltage unit comprising voltage source, transformer, eleventh resistor, twelfth resistor, thirteenth resistor, the 8th electricity
One end ground connection of appearance, the 9th capacitance, the tenth capacitance, third diode, the 4th diode, the 5th diode, eleventh resistor is another
One end is connected with the cathode of voltage source, and the positive and negative anodes of voltage source are connected with the 8th capacitance, the 9th capacitance respectively, eleventh resistor with
9th capacitance is connected, and the first pin of transformer, second pin be connected with the 8th capacitance, the 9th capacitance respectively, and the of transformer
Three pins, the 4th pin are connected with twelfth resistor, the tenth capacitance respectively, twelfth resistor and third Diode series, and the tenth
All with the 5th Diode series, the tenth capacitance connects with thirteenth resistor for two resistance, third diode, third diode and the tenth
Three resistor coupled in parallel and all with the 4th Diode series；
Protection location comprising voltage protection chip, third transistor, the 14th resistance, the 15th resistance, the 16th resistance,
11st capacitance, the 12nd capacitance, the 13rd capacitance, the 14th capacitance, the first transistor, second transistor, the first breaker,
Second breaker, third breaker, the 6th diode, the 7th diode, the 8th diode, the 9th diode, voltage protection core
The first pin, second pin, the third pin of piece are connected with the 6th diode, the 7th diode, the 8th diode respectively, and the 6th
Diode, the 7th diode, the 8th diode are connected with the 11st capacitance, the 14th resistance, second transistor respectively, and the 11st
In parallel and all connect with the first transistor, the 15th resistance and the first transistor between capacitance, the 14th resistance, second transistor
Series connection, the 4th pin of voltage protection chip, the 5th pin, the 6th pin respectively with the first breaker, the second breaker, third
Breaker be connected, the first breaker, the second breaker, third breaker respectively with the 12nd capacitance, the 13rd capacitance, the 14th
Capacitance is connected, and the 12nd capacitance is connected with the emitter of third transistor, the collector phase of the 13rd capacitance and third transistor
Even, the base stage of third transistor is connected with the 16th resistance, the 14th capacitance and the 9th Diode series, the 9th diode and the
16 resistance are connected and are grounded.
2. the protection circuit of IGBT drivers as described in claim 1, which is characterized in that the first transistor, the second crystalline substance
Body pipe is all the transistor of quartz system.
3. the protection circuit of IGBT drivers as described in claim 1, which is characterized in that first breaker, second are broken
Road device, third breaker are all vacuum circuit breakers.
4. the protection circuit of IGBT drivers as described in claim 1, which is characterized in that the voltage checking chip used
It is the chip of S-1206B12-I6T2G models.
5. the protection circuit of IGBT drivers as described in claim 1, which is characterized in that the voltage protection chip used
It is the chip of R3111N351C-TR-F models.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721809085.3U CN207801887U (en) | 2017-12-22 | 2017-12-22 | The protection circuit of IGBT drivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721809085.3U CN207801887U (en) | 2017-12-22 | 2017-12-22 | The protection circuit of IGBT drivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207801887U true CN207801887U (en) | 2018-08-31 |
Family
ID=63281910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721809085.3U Active CN207801887U (en) | 2017-12-22 | 2017-12-22 | The protection circuit of IGBT drivers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207801887U (en) |
-
2017
- 2017-12-22 CN CN201721809085.3U patent/CN207801887U/en active Active
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